Dehorner



o 8 6, 6 9 A 1l Jane '3, 1924.

11R; sEAMoN ET AL DEHOHNER Patented .lune 3, 1924.

Unirse STATES Maasai PATENT orties.

THOMAS RUDOLPH SEAMO'N .AND JOHN HENRY DONALDSON, OF TO'PAZ, CALIFORNIA.

Dna-roanne.

Application filed October 6, 1920. Serial No. 415,070.

To all whom t may concern:

Be it known that we, v'.lHou-As R. SEAMON and JOHN H. DoNALDsoN, citizens of the United States, and residents of Topaz, in

the county of Mono and State of California,

have Vinvented a new and Improved Dehorner, of which the following is a full, clear, and exact description.

This invention relates to improvements in l@ dehorners,4 an object of the invention being to provide a device of the character statedV which. will operate to cut olf the horns accurately and quickly so as to insure a clean cut, preventing crushing of the horn and 5 also reducing the pain of operation 'to a minimum. y

A further object is to provide a dehorner which can be manufactured and sold at a reasonably low price, which can be easily set for the cutting operation, and which,

when released, will perform said operation accurately.

With these'and other objects in view the invention consists in certain novel features ;..3 of construction; andcombi-nations and arrangements of partsas will be more fully hereinafter described and pointed out in the claims. y

ln the accompanying drawings l Figure 1 is a view in longitudinal section illustrating our improved dehorner.

Figure 2 is a fragmentary view on an enlarged scale partly in elevation and partly in longitudinal section, the view being taken at right angles to Figure 1.

Figure 3 is an enlarged view Lin elevation of the cutting head and cutting blades.

Figure 4 is a perspective view of the collar 18 removed.

1 represents a tubular barrel, preferably enlarged at oneend as shown at 2, forming a handle or handheld. A cutting head 3 is formed on the other end of the barrel 1 and consists of a pair of parallel longitudinally grooved side members il, 4, lin which a fixed cutting blade 5'is rigidly secured. A movable cutting bladev 6 is guided .in the grooved members 4, 4, and has a shear cut relative to the fixed blade 5 so that the blades operate in the manner of a guillotine and have opposed curved cutting edges 7, as clearly shown in Figure 3.

The movable cutting blade 6 is fixed to one end of a plunger 8, this plunger constituting a rod which is housed mainly within the barrel 1 and is guided in its longitudinal movement by rings 9 and 10 secured in the barrel, as shown clearly in Figure 1.

The ring 10, constituting a spring seat, is Welded or otherwise fixed to the plunger S near the cutting blade 6 and a coiled spring 11 is positioned around the plunger and interposed between the spring seat 10 and one f the rings 9 exerting pressure on the plunger and tending to force the cutting blade 6 across the cutting edge of the fixed blade 5.

A bumper 12 is secured on the inner end of the 'plunger 8 and is preferably composed of rubber orother suitable material interposed between metal disks 13 and secured on the plunger by a clamping nut 14. This bumper serves the purpose of engaging one of the rings 9 to prevent an extreme movenient or displacement of the plunger and 7 the cutting blade 6.

The plunger 8 is provided throughout a portion of its length with rack teeth 15, with which a toothed segment 16 on the end of an operating lever 17 is adapted to mesh fi') to force the plunger in a direction to` contract the spring 11. y

A collar 18 is ixed around the barrel 1 and is provided with. a pair of tongues 19 located at opposite' sides of a slot 20 in the S5 barrel 1 and providing bearings for trunnlons 21 on the lever 17. These trunnions 21 are positioned inslots 22 inthe tongues 19, said slots positioned at an angle to the longitudinal plane of the plunger so that when the t-runnions are moved longitudinally in the slots, the toothed segment 16 will be moved into or out of mesh with the rack 15. The ends of the slots Q2 farthest removed from the plunger are preferably enlarged slightly as shown. so as to provide ample accommodation for lateral movement of the trunnions and the parts connected thereto to permit a free disengagement of the segment with the rack after the spring is under tension.

- To hold the lever initsinoperative position, we provide av spring catch23 which is fixed tov the barrel and under which the recessed and reduced free end 24 of the lever 17 is adapted to be sprung.

The plunger 8 is provided with a series of ratchet notches 25 which are adapted to receive the inner ends of a lever catch 26. This lever catch is fulcrumed between its ends in lugs 27 on a collar or clamping ring 28 around the outside of the barrel 1 and a spring 29 is coiled around the pivot 30 of said lever with one end bearing against the barrel and the other end against the longer end of said lever tending to press the shorter end of said lever into operative engagement with the ratchet notches 25 of the plunger.

The operation of our improved device is as Jfollows: With the parts as shown in Figure l, it lis simply necessary to force the 'free end oif the lever iT toward the head end of the barrel l, which movement of the lever, by reason of engagement ot the segment 1G with the rack l5, Will cause the plunger to move longitudinally in a direction to contract the spring 1l and move the cutting blade 6 away from the fixed cutting blade 5. During this movement of the plunger', the lever catch 2G Will ride tirst into one ratchet recess Q5 and then the other, and Will operate to hold the plunger against movement in the opposite direction, thus serving as a trigger. lVhen the plunger is thus held by the lever catch or trigger in its set position with the spring il under tension, the lever i7 is moved toward the barrel l so that its tree end is caught under the catch 23 and a slight downward or longitudinal movement imparted to the lever, Whiclnby reason of the position of the trunnions 2l in the slots 2:2, will cause a` clear disengagement o'lE said segment With the rack 15 of the plunger 8. The dehorner is then in set position foruse and it is simply necessary to place the cutting head over 'the horn with the horn positioned between the fixed blade 5 and the movable blade 6. lhen the lever catch or trigger 26 is manually released,.the plunger and cutting blade will move forward With great rapidity and canse a quick and clean cnt of the horn to be made.

The operation will be so quickly periormed as to reduce the pain of cutting to a minimum and the cut will be a clean one so as to obviate any possibility of crushing or tearing the horn.

Various slight changes might be made in the general form and arrangement `of the parts described Without departing from the invention. and hence We do not limit ourselves to the precise details set forth, but consider ourselves at liberty to make such changes and alterations as lfairly 'fall Within the spirit and scope of the appended claims.

lVe claim:

l. A dehorner, comprising a barrel, a cutting head in one end of the barrel, a fixed blade in the cutting head, a movable blade in the cutting head and cooperating with the fixed blade, a spring pressed plunger in the barrel secured to the movable blade, a rack on the plunger, a. lever having a segment thereon normally meshing with the rack, trunnions on the lever, a pair of slotted members on the barrel having cam faces and receiving the trunnions and causing a disengagement oi the segment with the rack when the plunger reaches its set position, and a trigger. adapted to hold the plunger in its set position,

2. A dehorner, comprising a barrel, a cutting head in one end of the barrel, a fixed blade in the cutting head, a movable blade in the cutting head and cooperating With the lixed blade, a spring pressed plunger in the barrel secured to the movable blade, a rack on the plunger, a lever having asegment thereon normally meshing with the rack, trunnions on the lever, a pair of slotted members on the barrel having cam faces and receivingthe trunnions and causing a disengagement of the segment with the rack when the plunger reaches its set position, a cushioning bumper on the plunger, and a lixcd member in the barrel engaged by the bumper when the plunger reaches the. extreme ot its 'forward movement.

3. A dehorner, comprising a barrel, a cutting head on one end olf the barrel, a lixed blade in the cutting head, a movable blade guided in thev cutting head and cooperating withthe lixed blade, a plunger in the barrel secured to thev movable blade, a spring in the barrel engaging the plunger and tending to move the movable blade towardA the cutting blade, a rack on theplunger, a pivoted lever, a segment on vthe lever engaging the rack, said lever adapted to move ther plunger'to compress the spring, a'trigger for holding the plunger in set position, means permitting the disengagement of the segment With the plunger, said last-mentioned means comprising a pair of tongues having slots there in at an angle to the plunger, trunnions on the lever ulcrumed in said slots, and a catch on the barrel adapted to engage one end of the lever and hold the lever in such position as to maintain the trunnions in the ends'o'i' the slots With the segment out of engagement with the rack.

THOMAS RUDOLPH SEAMON. JOHN HENRY DONALDSON. 

